CU+ http 504 error

At first. all three failed, when trying overnight. And these are not available via the DStv Now app.

So, managed to get ep 1 down. Ep 2 has now failed 2 or 3 times with an HTTP 504 error.

I've rebooted the decoder, I've rebooted the router. I've tried again. I've run connectivity checker (even though I could still stream or download other series). I also searched this forum, and Google, for the error, and nothing.